I don't know what you mean. My ice has no GUI for preferences. You probably need to download icecc or any of the other various doohickeys and add it to the menu. Though that does sound like the hardcoded region of the menu. Or it was added to the taskbar - not sure from your description. You may have gotten some distro-hacked version.
What prefs do you want to change? There is no 'learning how to manipulate the text file in an editor'. That's what's so great about it. If you know how to use any editor for anything, you can use it for everything.
